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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/fs/dlm/dlm_internal.h
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/fs/dlm/dlm_internal.h')
-rw-r--r--ANDROID_3.4.5/fs/dlm/dlm_internal.h661
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diff --git a/ANDROID_3.4.5/fs/dlm/dlm_internal.h b/ANDROID_3.4.5/fs/dlm/dlm_internal.h
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--- a/ANDROID_3.4.5/fs/dlm/dlm_internal.h
+++ /dev/null
@@ -1,661 +0,0 @@
-/******************************************************************************
-*******************************************************************************
-**
-** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
-** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
-**
-** This copyrighted material is made available to anyone wishing to use,
-** modify, copy, or redistribute it subject to the terms and conditions
-** of the GNU General Public License v.2.
-**
-*******************************************************************************
-******************************************************************************/
-
-#ifndef __DLM_INTERNAL_DOT_H__
-#define __DLM_INTERNAL_DOT_H__
-
-/*
- * This is the main header file to be included in each DLM source file.
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/sched.h>
-#include <linux/types.h>
-#include <linux/ctype.h>
-#include <linux/spinlock.h>
-#include <linux/vmalloc.h>
-#include <linux/list.h>
-#include <linux/errno.h>
-#include <linux/random.h>
-#include <linux/delay.h>
-#include <linux/socket.h>
-#include <linux/kthread.h>
-#include <linux/kobject.h>
-#include <linux/kref.h>
-#include <linux/kernel.h>
-#include <linux/jhash.h>
-#include <linux/miscdevice.h>
-#include <linux/mutex.h>
-#include <linux/idr.h>
-#include <asm/uaccess.h>
-
-#include <linux/dlm.h>
-#include "config.h"
-
-/* Size of the temp buffer midcomms allocates on the stack.
- We try to make this large enough so most messages fit.
- FIXME: should sctp make this unnecessary? */
-
-#define DLM_INBUF_LEN 148
-
-struct dlm_ls;
-struct dlm_lkb;
-struct dlm_rsb;
-struct dlm_member;
-struct dlm_rsbtable;
-struct dlm_dirtable;
-struct dlm_direntry;
-struct dlm_recover;
-struct dlm_header;
-struct dlm_message;
-struct dlm_rcom;
-struct dlm_mhandle;
-
-#define log_print(fmt, args...) \
- printk(KERN_ERR "dlm: "fmt"\n" , ##args)
-#define log_error(ls, fmt, args...) \
- printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args)
-
-#define log_debug(ls, fmt, args...) \
-do { \
- if (dlm_config.ci_log_debug) \
- printk(KERN_DEBUG "dlm: %s: " fmt "\n", \
- (ls)->ls_name , ##args); \
-} while (0)
-
-#define DLM_ASSERT(x, do) \
-{ \
- if (!(x)) \
- { \
- printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \
- "DLM: assertion: \"%s\"\n" \
- "DLM: time = %lu\n", \
- __LINE__, __FILE__, #x, jiffies); \
- {do} \
- printk("\n"); \
- BUG(); \
- panic("DLM: Record message above and reboot.\n"); \
- } \
-}
-
-
-struct dlm_direntry {
- struct list_head list;
- uint32_t master_nodeid;
- uint16_t length;
- char name[1];
-};
-
-struct dlm_dirtable {
- struct list_head list;
- spinlock_t lock;
-};
-
-struct dlm_rsbtable {
- struct rb_root keep;
- struct rb_root toss;
- spinlock_t lock;
-};
-
-
-/*
- * Lockspace member (per node in a ls)
- */
-
-struct dlm_member {
- struct list_head list;
- int nodeid;
- int weight;
- int slot;
- int slot_prev;
- int comm_seq;
- uint32_t generation;
-};
-
-/*
- * Save and manage recovery state for a lockspace.
- */
-
-struct dlm_recover {
- struct list_head list;
- struct dlm_config_node *nodes;
- int nodes_count;
- uint64_t seq;
-};
-
-/*
- * Pass input args to second stage locking function.
- */
-
-struct dlm_args {
- uint32_t flags;
- void (*astfn) (void *astparam);
- void *astparam;
- void (*bastfn) (void *astparam, int mode);
- int mode;
- struct dlm_lksb *lksb;
- unsigned long timeout;
-};
-
-
-/*
- * Lock block
- *
- * A lock can be one of three types:
- *
- * local copy lock is mastered locally
- * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set)
- * process copy lock is mastered on a remote node
- * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set)
- * master copy master node's copy of a lock owned by remote node
- * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set)
- *
- * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or
- * dlm_unlock. The dlm does not modify these or use any private flags in
- * this field; it only contains DLM_LKF_ flags from dlm.h. These flags
- * are sent as-is to the remote master when the lock is remote.
- *
- * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h.
- * Some internal flags are shared between the master and process nodes;
- * these shared flags are kept in the lower two bytes. One of these
- * flags set on the master copy will be propagated to the process copy
- * and v.v. Other internal flags are private to the master or process
- * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes.
- *
- * lkb_sbflags: status block flags. These flags are copied directly into
- * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion
- * ast. All defined in dlm.h with DLM_SBF_ prefix.
- *
- * lkb_status: the lock status indicates which rsb queue the lock is
- * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT
- *
- * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a
- * reply is needed. Only set when the lkb is on the lockspace waiters
- * list awaiting a reply from a remote node.
- *
- * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb
- * is a master copy, nodeid specifies the remote lock holder, when the
- * lkb is a process copy, the nodeid specifies the lock master.
- */
-
-/* lkb_status */
-
-#define DLM_LKSTS_WAITING 1
-#define DLM_LKSTS_GRANTED 2
-#define DLM_LKSTS_CONVERT 3
-
-/* lkb_flags */
-
-#define DLM_IFL_MSTCPY 0x00010000
-#define DLM_IFL_RESEND 0x00020000
-#define DLM_IFL_DEAD 0x00040000
-#define DLM_IFL_OVERLAP_UNLOCK 0x00080000
-#define DLM_IFL_OVERLAP_CANCEL 0x00100000
-#define DLM_IFL_ENDOFLIFE 0x00200000
-#define DLM_IFL_WATCH_TIMEWARN 0x00400000
-#define DLM_IFL_TIMEOUT_CANCEL 0x00800000
-#define DLM_IFL_DEADLOCK_CANCEL 0x01000000
-#define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */
-#define DLM_IFL_USER 0x00000001
-#define DLM_IFL_ORPHAN 0x00000002
-
-#define DLM_CALLBACKS_SIZE 6
-
-#define DLM_CB_CAST 0x00000001
-#define DLM_CB_BAST 0x00000002
-#define DLM_CB_SKIP 0x00000004
-
-struct dlm_callback {
- uint64_t seq;
- uint32_t flags; /* DLM_CBF_ */
- int sb_status; /* copy to lksb status */
- uint8_t sb_flags; /* copy to lksb flags */
- int8_t mode; /* rq mode of bast, gr mode of cast */
-};
-
-struct dlm_lkb {
- struct dlm_rsb *lkb_resource; /* the rsb */
- struct kref lkb_ref;
- int lkb_nodeid; /* copied from rsb */
- int lkb_ownpid; /* pid of lock owner */
- uint32_t lkb_id; /* our lock ID */
- uint32_t lkb_remid; /* lock ID on remote partner */
- uint32_t lkb_exflags; /* external flags from caller */
- uint32_t lkb_sbflags; /* lksb flags */
- uint32_t lkb_flags; /* internal flags */
- uint32_t lkb_lvbseq; /* lvb sequence number */
-
- int8_t lkb_status; /* granted, waiting, convert */
- int8_t lkb_rqmode; /* requested lock mode */
- int8_t lkb_grmode; /* granted lock mode */
- int8_t lkb_highbast; /* highest mode bast sent for */
-
- int8_t lkb_wait_type; /* type of reply waiting for */
- int8_t lkb_wait_count;
- int lkb_wait_nodeid; /* for debugging */
-
- struct list_head lkb_statequeue; /* rsb g/c/w list */
- struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */
- struct list_head lkb_wait_reply; /* waiting for remote reply */
- struct list_head lkb_ownqueue; /* list of locks for a process */
- struct list_head lkb_time_list;
- ktime_t lkb_timestamp;
- ktime_t lkb_wait_time;
- unsigned long lkb_timeout_cs;
-
- struct mutex lkb_cb_mutex;
- struct work_struct lkb_cb_work;
- struct list_head lkb_cb_list; /* for ls_cb_delay or proc->asts */
- struct dlm_callback lkb_callbacks[DLM_CALLBACKS_SIZE];
- struct dlm_callback lkb_last_cast;
- struct dlm_callback lkb_last_bast;
- ktime_t lkb_last_cast_time; /* for debugging */
- ktime_t lkb_last_bast_time; /* for debugging */
-
- char *lkb_lvbptr;
- struct dlm_lksb *lkb_lksb; /* caller's status block */
- void (*lkb_astfn) (void *astparam);
- void (*lkb_bastfn) (void *astparam, int mode);
- union {
- void *lkb_astparam; /* caller's ast arg */
- struct dlm_user_args *lkb_ua;
- };
-};
-
-
-struct dlm_rsb {
- struct dlm_ls *res_ls; /* the lockspace */
- struct kref res_ref;
- struct mutex res_mutex;
- unsigned long res_flags;
- int res_length; /* length of rsb name */
- int res_nodeid;
- uint32_t res_lvbseq;
- uint32_t res_hash;
- uint32_t res_bucket; /* rsbtbl */
- unsigned long res_toss_time;
- uint32_t res_first_lkid;
- struct list_head res_lookup; /* lkbs waiting on first */
- union {
- struct list_head res_hashchain;
- struct rb_node res_hashnode; /* rsbtbl */
- };
- struct list_head res_grantqueue;
- struct list_head res_convertqueue;
- struct list_head res_waitqueue;
-
- struct list_head res_root_list; /* used for recovery */
- struct list_head res_recover_list; /* used for recovery */
- int res_recover_locks_count;
-
- char *res_lvbptr;
- char res_name[DLM_RESNAME_MAXLEN+1];
-};
-
-/* find_rsb() flags */
-
-#define R_MASTER 1 /* only return rsb if it's a master */
-#define R_CREATE 2 /* create/add rsb if not found */
-
-/* rsb_flags */
-
-enum rsb_flags {
- RSB_MASTER_UNCERTAIN,
- RSB_VALNOTVALID,
- RSB_VALNOTVALID_PREV,
- RSB_NEW_MASTER,
- RSB_NEW_MASTER2,
- RSB_RECOVER_CONVERT,
- RSB_LOCKS_PURGED,
-};
-
-static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag)
-{
- __set_bit(flag, &r->res_flags);
-}
-
-static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag)
-{
- __clear_bit(flag, &r->res_flags);
-}
-
-static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag)
-{
- return test_bit(flag, &r->res_flags);
-}
-
-
-/* dlm_header is first element of all structs sent between nodes */
-
-#define DLM_HEADER_MAJOR 0x00030000
-#define DLM_HEADER_MINOR 0x00000001
-
-#define DLM_HEADER_SLOTS 0x00000001
-
-#define DLM_MSG 1
-#define DLM_RCOM 2
-
-struct dlm_header {
- uint32_t h_version;
- uint32_t h_lockspace;
- uint32_t h_nodeid; /* nodeid of sender */
- uint16_t h_length;
- uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */
- uint8_t h_pad;
-};
-
-
-#define DLM_MSG_REQUEST 1
-#define DLM_MSG_CONVERT 2
-#define DLM_MSG_UNLOCK 3
-#define DLM_MSG_CANCEL 4
-#define DLM_MSG_REQUEST_REPLY 5
-#define DLM_MSG_CONVERT_REPLY 6
-#define DLM_MSG_UNLOCK_REPLY 7
-#define DLM_MSG_CANCEL_REPLY 8
-#define DLM_MSG_GRANT 9
-#define DLM_MSG_BAST 10
-#define DLM_MSG_LOOKUP 11
-#define DLM_MSG_REMOVE 12
-#define DLM_MSG_LOOKUP_REPLY 13
-#define DLM_MSG_PURGE 14
-
-struct dlm_message {
- struct dlm_header m_header;
- uint32_t m_type; /* DLM_MSG_ */
- uint32_t m_nodeid;
- uint32_t m_pid;
- uint32_t m_lkid; /* lkid on sender */
- uint32_t m_remid; /* lkid on receiver */
- uint32_t m_parent_lkid;
- uint32_t m_parent_remid;
- uint32_t m_exflags;
- uint32_t m_sbflags;
- uint32_t m_flags;
- uint32_t m_lvbseq;
- uint32_t m_hash;
- int m_status;
- int m_grmode;
- int m_rqmode;
- int m_bastmode;
- int m_asts;
- int m_result; /* 0 or -EXXX */
- char m_extra[0]; /* name or lvb */
-};
-
-
-#define DLM_RS_NODES 0x00000001
-#define DLM_RS_NODES_ALL 0x00000002
-#define DLM_RS_DIR 0x00000004
-#define DLM_RS_DIR_ALL 0x00000008
-#define DLM_RS_LOCKS 0x00000010
-#define DLM_RS_LOCKS_ALL 0x00000020
-#define DLM_RS_DONE 0x00000040
-#define DLM_RS_DONE_ALL 0x00000080
-
-#define DLM_RCOM_STATUS 1
-#define DLM_RCOM_NAMES 2
-#define DLM_RCOM_LOOKUP 3
-#define DLM_RCOM_LOCK 4
-#define DLM_RCOM_STATUS_REPLY 5
-#define DLM_RCOM_NAMES_REPLY 6
-#define DLM_RCOM_LOOKUP_REPLY 7
-#define DLM_RCOM_LOCK_REPLY 8
-
-struct dlm_rcom {
- struct dlm_header rc_header;
- uint32_t rc_type; /* DLM_RCOM_ */
- int rc_result; /* multi-purpose */
- uint64_t rc_id; /* match reply with request */
- uint64_t rc_seq; /* sender's ls_recover_seq */
- uint64_t rc_seq_reply; /* remote ls_recover_seq */
- char rc_buf[0];
-};
-
-union dlm_packet {
- struct dlm_header header; /* common to other two */
- struct dlm_message message;
- struct dlm_rcom rcom;
-};
-
-#define DLM_RSF_NEED_SLOTS 0x00000001
-
-/* RCOM_STATUS data */
-struct rcom_status {
- __le32 rs_flags;
- __le32 rs_unused1;
- __le64 rs_unused2;
-};
-
-/* RCOM_STATUS_REPLY data */
-struct rcom_config {
- __le32 rf_lvblen;
- __le32 rf_lsflags;
-
- /* DLM_HEADER_SLOTS adds: */
- __le32 rf_flags;
- __le16 rf_our_slot;
- __le16 rf_num_slots;
- __le32 rf_generation;
- __le32 rf_unused1;
- __le64 rf_unused2;
-};
-
-struct rcom_slot {
- __le32 ro_nodeid;
- __le16 ro_slot;
- __le16 ro_unused1;
- __le64 ro_unused2;
-};
-
-struct rcom_lock {
- __le32 rl_ownpid;
- __le32 rl_lkid;
- __le32 rl_remid;
- __le32 rl_parent_lkid;
- __le32 rl_parent_remid;
- __le32 rl_exflags;
- __le32 rl_flags;
- __le32 rl_lvbseq;
- __le32 rl_result;
- int8_t rl_rqmode;
- int8_t rl_grmode;
- int8_t rl_status;
- int8_t rl_asts;
- __le16 rl_wait_type;
- __le16 rl_namelen;
- char rl_name[DLM_RESNAME_MAXLEN];
- char rl_lvb[0];
-};
-
-struct dlm_ls {
- struct list_head ls_list; /* list of lockspaces */
- dlm_lockspace_t *ls_local_handle;
- uint32_t ls_global_id; /* global unique lockspace ID */
- uint32_t ls_generation;
- uint32_t ls_exflags;
- int ls_lvblen;
- int ls_count; /* refcount of processes in
- the dlm using this ls */
- int ls_create_count; /* create/release refcount */
- unsigned long ls_flags; /* LSFL_ */
- unsigned long ls_scan_time;
- struct kobject ls_kobj;
-
- struct idr ls_lkbidr;
- spinlock_t ls_lkbidr_spin;
-
- struct dlm_rsbtable *ls_rsbtbl;
- uint32_t ls_rsbtbl_size;
-
- struct dlm_dirtable *ls_dirtbl;
- uint32_t ls_dirtbl_size;
-
- struct mutex ls_waiters_mutex;
- struct list_head ls_waiters; /* lkbs needing a reply */
-
- struct mutex ls_orphans_mutex;
- struct list_head ls_orphans;
-
- struct mutex ls_timeout_mutex;
- struct list_head ls_timeout;
-
- spinlock_t ls_new_rsb_spin;
- int ls_new_rsb_count;
- struct list_head ls_new_rsb; /* new rsb structs */
-
- struct list_head ls_nodes; /* current nodes in ls */
- struct list_head ls_nodes_gone; /* dead node list, recovery */
- int ls_num_nodes; /* number of nodes in ls */
- int ls_low_nodeid;
- int ls_total_weight;
- int *ls_node_array;
-
- int ls_slot;
- int ls_num_slots;
- int ls_slots_size;
- struct dlm_slot *ls_slots;
-
- struct dlm_rsb ls_stub_rsb; /* for returning errors */
- struct dlm_lkb ls_stub_lkb; /* for returning errors */
- struct dlm_message ls_stub_ms; /* for faking a reply */
-
- struct dentry *ls_debug_rsb_dentry; /* debugfs */
- struct dentry *ls_debug_waiters_dentry; /* debugfs */
- struct dentry *ls_debug_locks_dentry; /* debugfs */
- struct dentry *ls_debug_all_dentry; /* debugfs */
-
- wait_queue_head_t ls_uevent_wait; /* user part of join/leave */
- int ls_uevent_result;
- struct completion ls_members_done;
- int ls_members_result;
-
- struct miscdevice ls_device;
-
- struct workqueue_struct *ls_callback_wq;
-
- /* recovery related */
-
- struct mutex ls_cb_mutex;
- struct list_head ls_cb_delay; /* save for queue_work later */
- struct timer_list ls_timer;
- struct task_struct *ls_recoverd_task;
- struct mutex ls_recoverd_active;
- spinlock_t ls_recover_lock;
- unsigned long ls_recover_begin; /* jiffies timestamp */
- uint32_t ls_recover_status; /* DLM_RS_ */
- uint64_t ls_recover_seq;
- struct dlm_recover *ls_recover_args;
- struct rw_semaphore ls_in_recovery; /* block local requests */
- struct rw_semaphore ls_recv_active; /* block dlm_recv */
- struct list_head ls_requestqueue;/* queue remote requests */
- struct mutex ls_requestqueue_mutex;
- struct dlm_rcom *ls_recover_buf;
- int ls_recover_nodeid; /* for debugging */
- uint64_t ls_rcom_seq;
- spinlock_t ls_rcom_spin;
- struct list_head ls_recover_list;
- spinlock_t ls_recover_list_lock;
- int ls_recover_list_count;
- wait_queue_head_t ls_wait_general;
- struct mutex ls_clear_proc_locks;
-
- struct list_head ls_root_list; /* root resources */
- struct rw_semaphore ls_root_sem; /* protect root_list */
-
- const struct dlm_lockspace_ops *ls_ops;
- void *ls_ops_arg;
-
- int ls_namelen;
- char ls_name[1];
-};
-
-#define LSFL_WORK 0
-#define LSFL_RUNNING 1
-#define LSFL_RECOVERY_STOP 2
-#define LSFL_RCOM_READY 3
-#define LSFL_RCOM_WAIT 4
-#define LSFL_UEVENT_WAIT 5
-#define LSFL_TIMEWARN 6
-#define LSFL_CB_DELAY 7
-
-/* much of this is just saving user space pointers associated with the
- lock that we pass back to the user lib with an ast */
-
-struct dlm_user_args {
- struct dlm_user_proc *proc; /* each process that opens the lockspace
- device has private data
- (dlm_user_proc) on the struct file,
- the process's locks point back to it*/
- struct dlm_lksb lksb;
- struct dlm_lksb __user *user_lksb;
- void __user *castparam;
- void __user *castaddr;
- void __user *bastparam;
- void __user *bastaddr;
- uint64_t xid;
-};
-
-#define DLM_PROC_FLAGS_CLOSING 1
-#define DLM_PROC_FLAGS_COMPAT 2
-
-/* locks list is kept so we can remove all a process's locks when it
- exits (or orphan those that are persistent) */
-
-struct dlm_user_proc {
- dlm_lockspace_t *lockspace;
- unsigned long flags; /* DLM_PROC_FLAGS */
- struct list_head asts;
- spinlock_t asts_spin;
- struct list_head locks;
- spinlock_t locks_spin;
- struct list_head unlocking;
- wait_queue_head_t wait;
-};
-
-static inline int dlm_locking_stopped(struct dlm_ls *ls)
-{
- return !test_bit(LSFL_RUNNING, &ls->ls_flags);
-}
-
-static inline int dlm_recovery_stopped(struct dlm_ls *ls)
-{
- return test_bit(LSFL_RECOVERY_STOP, &ls->ls_flags);
-}
-
-static inline int dlm_no_directory(struct dlm_ls *ls)
-{
- return (ls->ls_exflags & DLM_LSFL_NODIR) ? 1 : 0;
-}
-
-int dlm_netlink_init(void);
-void dlm_netlink_exit(void);
-void dlm_timeout_warn(struct dlm_lkb *lkb);
-int dlm_plock_init(void);
-void dlm_plock_exit(void);
-
-#ifdef CONFIG_DLM_DEBUG
-int dlm_register_debugfs(void);
-void dlm_unregister_debugfs(void);
-int dlm_create_debug_file(struct dlm_ls *ls);
-void dlm_delete_debug_file(struct dlm_ls *ls);
-#else
-static inline int dlm_register_debugfs(void) { return 0; }
-static inline void dlm_unregister_debugfs(void) { }
-static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; }
-static inline void dlm_delete_debug_file(struct dlm_ls *ls) { }
-#endif
-
-#endif /* __DLM_INTERNAL_DOT_H__ */
-